The two human leads graced the show with an Ivy League pedigree. Ron Harper (who played Alan) was a Princeton graduate and won a fellowship to Harvard, while James Naughton (Pete) was a graduate of Brown and Yale.
It's like a hangover without the pleasure of booze.
During the closing credits of each episode was a statement "Based on characters from Planet of the Apes (1968)". This is not quite true, as there are no characters from the original novel or movie that appear on this series; only two character names. Galen was a doctor (named Dr. Galen) who assisted Zira as more or less a trained vet on the original film. The Galen on this series was an underling of the Ape Council. Zaius on the original film (Dr. Zaius) was head of the Ministry of Science and Keeper of the Faith. Zaius on this series was merely a politician (not titled "Doctor"), head of the Ape Council.
In 1981, selected episodes were re-edited into five made for TV movies: Back to the Planet of the Apes (1981) Forgotten City of the Planet of the Apes (1981) Treachery and Greed on the Planet of the Apes (1981) Life, Liberty and the Pursuit of the Planet of the Apes (1981) Farewell to the Planet of the Apes (1981). One episode, "The Liberator," was not aired during the original network run, but was aired in the UK and made its US debut in the 1990s.